Same here, took me well by surprise.
Nah, puppet Yoda was barely acceptable at the time (especially with all the hard CGI work going into all the other characters), and then you see pr0 CGI Yoda bouncing around in Attack of The Clones, you have to feel some effort was left out.
That and they can give the Trade Federation some proper fucking mouth movement also.
Same here, either they gave some thought or just cut it down a bit. As I said on Facebook to someone, it'd look better if Vader was saying to the Emperor "Enough." and then with Palpatine not listening decided to stop it himself.